Problem 3 The 60kg flywheel has a radius of gyration about its center of mass of

Question

Problem 3 The 60kg flywheel has a radius of gyration about its center of mass of 260mm It rotates with a constant angular velocity of 1300rev/min before the brake is applied Figure 1 of 1 0.5 m m 0.2 m 0.3 m Part A If the coefficient of kinetic friction between the brake pad B and the wheel's rim is Auk 0.5, determine the constant force at must be applied to the braking mechanism's handle in order to stop the wheel in 150 revolutions. Figure 1 Express your answer with the appropriate units Value Units Submit My Answers Give U Provide Feedback Continue

Explanation / Answer

The radius of gyration is the radius that the mass is centered, so can be used to calulate the inertia
Moment of inertia:
I = mk^2 where m is mass and k is the radius of gyration.
I = 60kg * 0.5 * 0.5

=15kg.m.m

Torque applied to flywheel:
The torque is from the mass in gravity acceleration pulling on the rope at the radius
Force = mass * gravity
= 60kg * 9.81m/s/s = 588N

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